package com.example.demo.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author yanglup
 * @create 2020-10-22 15:34
 */
public class LoginHandlerInterceptor implements HandlerInterceptor {//自己写的拦截器

    //如果true放行，false就不放行
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object loginUser=request.getSession().getAttribute("loginUser");
        if(loginUser==null){
//            request.setAttribute("msg","没有权限请先登录！");
            request.getSession().setAttribute("msg","没有权限请先登录");
            request.getRequestDispatcher("/login.html").forward(request,response);
            return false;
        }else {
            return true;
        }

    }
}
